本英国标准规定了亚甲基蓝颗粒试验，该试验允许评估呼吸器罐对颗粒云的防护效果。它包括测试方法、标准污渍的制备、所需仪器的说明以及维护说明。 .购买本文件时可获得的所有当前修订均包含在购买本文件中。

This British Standard specifies the methylene blue particulate test which permits the assessment of the protection afforded by respirator canisters against particulate clouds. It includes the method of test, preparation of standard stains, description of the apparatus required and notes on its maintenance. .All current amendments available at time of purchase are included with the purchase of this document.